(19521) Chaos
This object has a more recent orbit available here
Object
| Object | (19521) Chaos |
| Diameter(1) | 600 km |
| Dynamic class(1) | cubewano |
| Absolute magnitude | 4.80 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 45.462640 ± 0.006558 au |
| Eccentricity | 0.098650541 ± 0.000082401 |
| Inclination | 12.057007344 ± 0.001205719 ° |
| Longitude of ascending node | 50.042631 ± 0.001325 ° |
| Argument of perihelia | 58.484608 ± 0.038802 ° |
| Mean anomaly | 340.753969 ± 0.036136 ° |
| Orbital period | 306.54 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 19521_Chaos_nima_v2.bsp |
| Date of first observation | 1991-10-17 |
| Date of last observation | 2018-12-06 |
| Number of observations used in the fit | 162 |
| Number of rejected observations | 0 |
| Number of DES observations | 0 |
| Number of MPC observations | 112 |
| Number of unpublished observations | 50 |
| RMS of observations | 0.414 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.116 | 0.103 |
| 2018-07 | 0.198 | 0.103 |
| 2019-01 | 0.158 | 0.112 |
| 2019-07 | 0.256 | 0.109 |
| 2020-01 | 0.218 | 0.123 |
| 2020-07 | 0.324 | 0.116 |
| 2021-01 | 0.292 | 0.134 |
| 2021-07 | 0.403 | 0.124 |
| 2022-01 | 0.380 | 0.146 |
Ephemeris comparison
Difference between NIMAv2 and JPL12 in right ascension (weighted by cos δ) and in declination.
Gray area represents the 1-σ uncertainty of NIMA ephemeris. Green dots represent the DES observations.